Circuit breaker



FIG. 1 is a perspective view of a first embodiment of a circuit breaker;

FIG. 2 is a front view of a first embodiment of a circuit breaker;

FIG. 3 is a right view of a first embodiment of a circuit breaker;

FIG. 4 is a left view of a first embodiment of a circuit breaker;

FIG. 5 is a bottom view of a first embodiment of a circuit breaker;

FIG. 6 is a top view of a first embodiment of a circuit breaker;

FIG. 7 is a rear view of a first embodiment of a circuit breaker;

FIG. 8 is a perspective view of a second embodiment of a circuit breaker;

FIG. 9 is a front view of a second embodiment of a circuit breaker;

FIG. 10 is a right view of a second embodiment of a circuit breaker;

FIG. 11 is a left view of a second embodiment of a circuit breaker;

FIG. 12 is a bottom view of a second embodiment of a circuit breaker;

FIG. 13 is a top view of a second embodiment of a circuit breaker; and,

FIG. 14 is a rear view of a second embodiment of a circuit breaker.

Broken lines in the drawings form no part of the design to be patented. 

CLAIM The ornamental design for a “circuit breaker,” as shown and described. 